Just started having this problem a couple of weeks ago. When the engine is cold it starts fine, when the engine is hot it starts fine. If the car has been sitting for a couple of hours after driving and its still warm but not at full operating temp it will crank over for what seems like a loooong time before finally starting. No check engine light and the battery is good. Any pointers on what to check first?

Thanks

Crank and cam sensors, especially the crank.